On Wed, Aug 01, 2018 at 12:47:01PM +0200, Alexander Sverdlin wrote:

On 01/08/18 12:39, Mark Brown wrote:

quoted

I'm not 100% clear I follow what you mean by bus scan here but I *think*
that sounds about right.  The channel request/release could be factored
out into helper functions to minimize duplication.

Rob has an opinion that the driver should only claim the channels explicitly
specified in DT. This sounds about right, but this would be behavioral change.
What do you think?

If it results in platforms that previously used DMA not using DMA that
doesn't seem like a good idea.  I'd have thought that if we didn't have
DMA configured we'd already not be able to request a channel TBH.